User's Guide ______________________________________________________________________  
170 _________________________________________________________________ M211296EN-A 
Inside Enclosure Maintenance 
Checking Battery 
Battery status should be checked every 3 months. This is done either 
using a multi-meter on the batteries' plus and minus ends, or by pressing 
the QBR101 battery charger. Press the QBR101C battery charger status 
button to see the battery status and if the system has any power 
(AC(mains)/battery): 
-  If the LED is green, the battery is OK. 
-  If the LED is yellow, the battery voltage is low (charge <11.5 V).  
-  If the LED is red, the battery is empty (charge <10 V).  
If the battery status is red even after charging for a while, the battery is 
old and needs to be replaced. The lead acid battery may age in 3 to 
5 years and needs to be replaced with a new one. 
Pressure Sensor BARO-1 
Periodic Maintenance 
Under normal operating conditions, BARO-1 needs only a minimal 
amount of maintenance. 
-  Keep the pressure port clean. Check the pressure port every time when 
visiting the site. 
-  Annually, compare pressure values against a calibrated portable 
standard.